If anything, evidence suggests otherwise, as Nechayev mentions at least a limited degree of inclusion in "Journey's End".
The same episode where they were about to remove a colony by force? Yeah...I'm not sure how believable that is, unless "limited degree of inclusion" means bringing everyone there to break the news. I'd consider the improper handling of these colonies as the Federation as evidence that said colonies were improperly handled in the treaty process.
Sadly, there's no real canon evidence one way or another, apart from interpretation of what has been shown on the show.